2011 Rain Sensing Wipers too fast

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Nov 12, 2018 | 12:21 PM

omee

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Joined: Jul 2010

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From: ON

2011 Rain Sensing Wipers too fast

Hi All,
I have a 2011 ES350 Ultra Premium.
I tried looking around for answers but couldn't find any. The rain sensing wipers in my car (with the stalk sensitivity at minimum) are always wiping too fast for any condition. They will go absolutely berserk even with the slightest of rain. Changing the sensitivity from the stalk does not make any difference.

The windscreen is original OEM and hasn't been replaced.

Any thoughts on how to tone down the sensitivity of the sensor?
Thanks!

Nov 12, 2018 | 12:44 PM

jkayca

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Joined: Jul 2008

Posts: 515

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From: Ontario

IIRC there's a sensor behind the rear view mirror attach to the inside of the windshield. It may need replacing or you may simply need to clean the outside of the windshield, where the sensor is.

Nov 12, 2018 | 01:13 PM

omee

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Joined: Jul 2010

Posts: 38

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From: ON

Quote:

Originally Posted by jkayca

IIRC there's a sensor behind the rear view mirror attach to the inside of the windshield. It may need replacing or you may simply need to clean the outside of the windshield, where the sensor is.

The area above the sensor is definitely clean...
I wonder if a bad sensor would throw a code or have a warning light?? Would there be any way to test a sensor? (Resistance, voltage etc?)

Nov 13, 2018 | 12:29 AM

ESh

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From: MI

There is a way to adjust sensitivity of the sensor. It can be done through Techstream only.

Nov 13, 2018 | 04:42 AM

codejd

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Joined: May 2008

Posts: 195

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From: Kansas

Quote:

Originally Posted by omee

I have a 2008 PP that I took to the dealer over 11 years ago for this same issue as this was my first car with this feature and I thought the wipers were going to fly off the car! The service advisor rolled his eyes when I stated the problem and naturally nothing was done. Over the years I too have played with the stalk with no real difference and have simply decided to let them go. Eventually they reset and resume normal operation but every now and then it gets crazy.